Add tracing

authmw/token.go

@@ -75,6 +75,7 @@ func VerifyToken(authURL string, permittedRoles []string) func(http.Handler) htt
 				_ = encoder.Encode(&errResp)
 				return
 			}
+			// TODO: Check that it is in permitted
 
 			// Add claims to request context
 			if claims, ok := token.Claims.(*auth.MicrofilmClaims); ok && token.Valid {

go.mod

@@ -10,15 +10,35 @@ require (
 	github.com/nats-io/nats.go v1.31.0
 	github.com/pelletier/go-toml/v2 v2.1.0
 	github.com/urfave/cli/v2 v2.25.7
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0
+	go.opentelemetry.io/otel v1.19.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.19.0
+	go.opentelemetry.io/otel/sdk v1.19.0
+	go.opentelemetry.io/otel/trace v1.19.0
 )
 
 require (
+	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.3 // indirect
+	github.com/felixge/httpsnoop v1.0.3 // indirect
+	github.com/go-logr/logr v1.2.4 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.16.0 // indirect
 	github.com/klauspost/compress v1.17.0 // indirect
 	github.com/nats-io/nkeys v0.4.5 // indirect
 	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.19.0 // indirect
+	go.opentelemetry.io/otel/metric v1.19.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.0.0 // indirect
 	golang.org/x/crypto v0.14.0 // indirect
+	golang.org/x/net v0.12.0 // indirect
 	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20230711160842-782d3b101e98 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
+	google.golang.org/grpc v1.58.2 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 )

go.sum

@@ -1,16 +1,35 @@
 git.t-juice.club/microfilm/users v0.1.2 h1:wudwa4C5ecUGmbe+Y6A77lVHx8dFSy/ib47HBOrQ7AU=
 git.t-juice.club/microfilm/users v0.1.2/go.mod h1:CWb2XYyifeaiLMdEqPyLB4EEj2MKcGogt+wt+PGdcSw=
+github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
+github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cpuguy83/go-md2man/v2 v2.0.3 h1:qMCsGGgs+MAzDFyp9LpAe1Lqy/fY/qCovCm0qnXZOBM=
 github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/felixge/httpsnoop v1.0.3 h1:s/nj+GCswXYzN5v2DpNMuMQYe+0DDwt5WVCU6CWBdXk=
+github.com/felixge/httpsnoop v1.0.3/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/go-chi/chi/v5 v5.0.10 h1:rLz5avzKpjqxrYwXNfmjkrYYXOyLJd37pz53UFHC6vk=
 github.com/go-chi/chi/v5 v5.0.10/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ=
+github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/golang-jwt/jwt/v5 v5.0.0 h1:1n1XNM9hk7O9mnQoNBGolZvzebBQ7p93ULHRc28XJUE=
 github.com/golang-jwt/jwt/v5 v5.0.0/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
+github.com/golang/glog v1.1.0 h1:/d3pCKDPWNnvIWe0vVUpNP32qc8U3PDVxySP/y360qE=
+github.com/golang/glog v1.1.0/go.mod h1:pfYeQZ3JWZoXTV5sFc986z3HTpwQs9At6P4ImfuP3NQ=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
 github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.16.0 h1:YBftPWNWd4WwGqtY2yeZL2ef8rHAxPBD8KFhJpmcqms=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.16.0/go.mod h1:YN5jB8ie0yfIUg6VvR9Kz84aCaG7AsGZnLjhHbUqwPg=
 github.com/klauspost/compress v1.17.0 h1:Rnbp4K9EjcDuVuHtd0dgA4qNuv9yKDYKK1ulpJwgrqM=
 github.com/klauspost/compress v1.17.0/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/nats-io/nats.go v1.31.0 h1:/WFBHEc/dOKBF6qf1TZhrdEfTmOZ5JzdJ+Y3m6Y/p7E=
@@ -36,10 +55,43 @@ github.com/urfave/cli/v2 v2.25.7 h1:VAzn5oq403l5pHjc4OhD54+XGO9cdKVL/7lDjF+iKUs=
 github.com/urfave/cli/v2 v2.25.7/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0 h1:x8Z78aZx8cOF0+Kkazoc7lwUNMGy0LrzEMxTm4BbTxg=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0/go.mod h1:62CPTSry9QZtOaSsE3tOzhx6LzDhHnXJ6xHeMNNiM6Q=
+go.opentelemetry.io/otel v1.19.0 h1:MuS/TNf4/j4IXsZuJegVzI1cwut7Qc00344rgH7p8bs=
+go.opentelemetry.io/otel v1.19.0/go.mod h1:i0QyjOq3UPoTzff0PJB2N66fb4S0+rSbSB15/oyH9fY=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.19.0 h1:Mne5On7VWdx7omSrSSZvM4Kw7cS7NQkOOmLcgscI51U=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.19.0/go.mod h1:IPtUMKL4O3tH5y+iXVyAXqpAwMuzC1IrxVS81rummfE=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.19.0 h1:IeMeyr1aBvBiPVYihXIaeIZba6b8E1bYp7lbdxK8CQg=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.19.0/go.mod h1:oVdCUtjq9MK9BlS7TtucsQwUcXcymNiEDjgDD2jMtZU=
+go.opentelemetry.io/otel/metric v1.19.0 h1:aTzpGtV0ar9wlV4Sna9sdJyII5jTVJEvKETPiOKwvpE=
+go.opentelemetry.io/otel/metric v1.19.0/go.mod h1:L5rUsV9kM1IxCj1MmSdS+JQAcVm319EUrDVLrt7jqt8=
+go.opentelemetry.io/otel/sdk v1.19.0 h1:6USY6zH+L8uMH8L3t1enZPR3WFEmSTADlqldyHtJi3o=
+go.opentelemetry.io/otel/sdk v1.19.0/go.mod h1:NedEbbS4w3C6zElbLdPJKOpJQOrGUJ+GfzpjUvI0v1A=
+go.opentelemetry.io/otel/trace v1.19.0 h1:DFVQmlVbfVeOuBRrwdtaehRrWiL1JoVs9CPIQ1Dzxpg=
+go.opentelemetry.io/otel/trace v1.19.0/go.mod h1:mfaSyvGyEJEI0nyV2I4qhNQnbBOUUmYZpYojqMnX2vo=
+go.opentelemetry.io/proto/otlp v1.0.0 h1:T0TX0tmXU8a3CbNXzEKGeU5mIVOdf0oykP+u2lIVU/I=
+go.opentelemetry.io/proto/otlp v1.0.0/go.mod h1:Sy6pihPLfYHkr3NkUbEhGHFhINUSI/v80hjKIs5JXpM=
 golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
 golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
+golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
 golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
 golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/genproto v0.0.0-20230711160842-782d3b101e98 h1:Z0hjGZePRE0ZBWotvtrwxFNrNE9CUAGtplaDK5NNI/g=
+google.golang.org/genproto v0.0.0-20230711160842-782d3b101e98/go.mod h1:S7mY02OqCJTD0E1OiQy1F72PWFB4bZJ87cAtLPYgDR0=
+google.golang.org/genproto/googleapis/api v0.0.0-20230711160842-782d3b101e98 h1:FmF5cCW94Ij59cfpoLiwTgodWmm60eEV0CjlsVg2fuw=
+google.golang.org/genproto/googleapis/api v0.0.0-20230711160842-782d3b101e98/go.mod h1:rsr7RhLuwsDKL7RmgDDCUc6yaGr1iqceVb5Wv6f6YvQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 h1:bVf09lpb+OJbByTj913DRJioFFAjf/ZGxEz7MajTp2U=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98/go.mod h1:TUfxEVdsvPg18p6AslUXFoLdpED4oBnGwyqk3dV1XzM=
+google.golang.org/grpc v1.58.2 h1:SXUpjxeVF3FKrTYQI4f4KvbGD5u2xccdYdurwowix5I=
+google.golang.org/grpc v1.58.2/go.mod h1:tgX3ZQDlNJGU96V6yHh1T/JeoBQ2TXdr43YbYSsCJk0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

server/middleware.go

@@ -1,10 +1,13 @@
 package server
 
 import (
+	"fmt"
 	"net/http"
 	"time"
 
 	"github.com/go-chi/chi/v5/middleware"
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+	"go.opentelemetry.io/otel/trace"
 )
 
 func (s *Server) MiddlewareLogging(next http.Handler) http.Handler {
@@ -28,3 +31,14 @@ func (s *Server) MiddlewareLogging(next http.Handler) http.Handler {
 	}
 	return http.HandlerFunc(fn)
 }
+
+func (s *Server) MiddlewareTracing(next http.Handler) http.Handler {
+	fn := func(w http.ResponseWriter, r *http.Request) {
+		span := trace.SpanFromContext(r.Context())
+		span.AddEvent("event")
+
+		h := otelhttp.NewHandler(next, fmt.Sprintf("%s %s", r.Method, r.URL.Path))
+		h.ServeHTTP(w, r)
+	}
+	return http.HandlerFunc(fn)
+}

server/server.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"context"
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
@@ -19,6 +20,13 @@ import (
 	"github.com/golang-jwt/jwt/v5"
 	"github.com/google/uuid"
 	"github.com/nats-io/nats.go"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+	"go.opentelemetry.io/otel/trace"
 )
 
 const DefaultTokenDuration time.Duration = 24 * time.Hour
@@ -38,10 +46,17 @@ type Server struct {
 func NewServer(config *Config) (*Server, error) {
 	srv := &Server{}
 
+	tp, err := tracerProvider("jaeger:4318")
+	if err != nil {
+		return nil, err
+	}
+	otel.SetTracerProvider(tp)
+
 	r := chi.NewRouter()
 
 	r.Use(middleware.RequestID)
 	r.Use(srv.MiddlewareLogging)
+	r.Use(srv.MiddlewareTracing)
 
 	r.Get("/key", srv.PubkeyHandler)
 	r.Post("/{id}/token", srv.TokenHandler)
@@ -79,6 +94,26 @@ func NewServer(config *Config) (*Server, error) {
 	return srv, nil
 }
 
+func tracerProvider(url string) (*sdktrace.TracerProvider, error) {
+	exp, err := otlptracehttp.New(context.Background(), otlptracehttp.WithEndpoint(url), otlptracehttp.WithInsecure())
+	if err != nil {
+		return nil, err
+	}
+
+	res := resource.NewWithAttributes(semconv.SchemaURL,
+		semconv.ServiceName("mf-auth"),
+		semconv.ServiceVersion(auth.Version),
+	)
+	tp := sdktrace.NewTracerProvider(
+		sdktrace.WithBatcher(exp, sdktrace.WithBatchTimeout(time.Second)),
+		sdktrace.WithResource(res),
+	)
+	otel.SetTracerProvider(tp)
+	otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
+
+	return tp, nil
+}
+
 func InfoHandler(w http.ResponseWriter, r *http.Request) {
 	enc := json.NewEncoder(w)
 
@@ -96,6 +131,9 @@ func WriteError(w http.ResponseWriter, response auth.ErrorResponse) {
 }
 
 func (s *Server) PubkeyHandler(w http.ResponseWriter, r *http.Request) {
+	span := trace.SpanFromContext(r.Context())
+
+	span.AddEvent("Start marshalling public key.")
 	enc := json.NewEncoder(w)
 	key, err := x509.MarshalPKIXPublicKey(s.signingKey.Public())
 	if err != nil {
@@ -106,6 +144,7 @@ func (s *Server) PubkeyHandler(w http.ResponseWriter, r *http.Request) {
 		})
 		return
 	}
+	span.AddEvent("Finished marshalling public key.")
 	response := auth.PubkeyResponse{
 		PubKey: key,
 	}
@@ -114,6 +153,7 @@ func (s *Server) PubkeyHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func (s *Server) TokenHandler(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
 	decoder := json.NewDecoder(r.Body)
 	defer r.Body.Close()
 
@@ -135,7 +175,7 @@ func (s *Server) TokenHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if err := s.userClient.VerifyUserPassword(userIdentifier, request.Password); err != nil {
+	if err := s.userClient.VerifyUserPassword(ctx, userIdentifier, request.Password); err != nil {
 		WriteError(w, auth.ErrorResponse{
 			Status:  http.StatusUnauthorized,
 			Message: fmt.Sprintf("Unable to verify password: %s", err),
@@ -143,7 +183,7 @@ func (s *Server) TokenHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	u, err := s.userClient.GetUser(userIdentifier)
+	u, err := s.userClient.GetUser(ctx, userIdentifier)
 	if err != nil {
 		WriteError(w, auth.ErrorResponse{
 			Status:  http.StatusUnauthorized,

server/userclient.go

@@ -9,20 +9,31 @@ import (
 	"time"
 
 	"git.t-juice.club/microfilm/users"
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+	"go.opentelemetry.io/otel"
 )
 
 type UserClient struct {
 	BaseURL string
+	client  *http.Client
 }
 
 const defaultTimeout time.Duration = 5 * time.Second
 
 func NewUserClient(baseurl string) *UserClient {
-	return &UserClient{BaseURL: baseurl}
+	return &UserClient{
+		BaseURL: baseurl,
+		client: &http.Client{
+			Transport: otelhttp.NewTransport(http.DefaultTransport),
+		},
+	}
 }
 
-func (c *UserClient) VerifyUserPassword(username, password string) error {
+func (c *UserClient) VerifyUserPassword(ctx context.Context, username, password string) error {
-	ctx, cancel := context.WithTimeout(context.Background(), defaultTimeout)
+	ctx, span := otel.GetTracerProvider().Tracer("").Start(ctx, "verify-user-password")
+	defer span.End()
+
+	ctx, cancel := context.WithTimeout(ctx, defaultTimeout)
 	defer cancel()
 
 	url := fmt.Sprintf("%s/%s/verify", c.BaseURL, username)
@@ -42,12 +53,11 @@ func (c *UserClient) VerifyUserPassword(username, password string) error {
 		return err
 	}
 
-	client := http.Client{}
+	resp, err := c.client.Do(req)
-
-	resp, err := client.Do(req)
 	if err != nil {
 		return err
 	}
+	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
 		return fmt.Errorf("authentication failed")
@@ -56,10 +66,13 @@ func (c *UserClient) VerifyUserPassword(username, password string) error {
 	return nil
 }
 
-func (c *UserClient) GetUser(identifier string) (users.User, error) {
+func (c *UserClient) GetUser(ctx context.Context, identifier string) (users.User, error) {
 	var u users.User
 
-	ctx, cancel := context.WithTimeout(context.Background(), defaultTimeout)
+	ctx, span := otel.GetTracerProvider().Tracer("").Start(ctx, "get-user")
+	defer span.End()
+
+	ctx, cancel := context.WithTimeout(ctx, defaultTimeout)
 	defer cancel()
 
 	url := fmt.Sprintf("%s/%s", c.BaseURL, identifier)
@@ -69,9 +82,7 @@ func (c *UserClient) GetUser(identifier string) (users.User, error) {
 		return u, err
 	}
 
-	client := http.Client{}
+	resp, err := c.client.Do(req)
-
-	resp, err := client.Do(req)
 	if err != nil {
 		return u, err
 	}

version.go

@@ -1,3 +1,3 @@
 package auth
 
-const Version = "v0.1.1"
+const Version = "v0.1.2"