Adding Groups API endpoint and SDK (#122)

* feat: Add group grpc handler.

* feat: Add group sdk hooks.

* fix:  Adding forgotten generated group sdk file.

* fix:  Fix a copy/paste error in test msg.

* fix:  Correct assert error msg.

* fix: Remove unused proto imports.

api/users/user_test.go

@@ -27,7 +27,7 @@ func TestUser_Crud(t *testing.T) {
 		if !assert.Nil(apiErr, step) && apiErr.Message != nil {
 			t.Errorf("ApiError message: %q", *apiErr.Message)
 		}
-		assert.NotNil(u, "returned project", step)
+		assert.NotNil(u, "returned no resource", step)
 		gotName := ""
 		if u.Name != nil {
 			gotName = *u.Name