Allow clients to change password

protos/ezshare.proto

@@ -121,9 +121,17 @@ message ApproveUserRequest {
     string user_id = 1;
 }
 
+
+// Change password
+message ChangePasswordRequest {
+    string old_password = 1;
+    string new_password = 2;
+}
+
 service UserService {
     rpc Register(RegisterUserRequest) returns (RegisterUserResponse) {}
     rpc Login(LoginUserRequest) returns (LoginUserResponse) {}
     rpc List(ListUsersRequest) returns (ListUsersResponse) {}
     rpc Approve(ApproveUserRequest) returns (Empty) {}
+    rpc ChangePassword(ChangePasswordRequest) returns (Empty) {}
 }