Bugfix: Update experiment engine Google client initialisation (#68)

* Update experiment engine google client init

* Remove unused scope

plugins/turing/manager/experiment_manager.go

@@ -10,14 +10,14 @@ import (
 	"github.com/caraml-dev/turing/engines/experiment/log"
 	"github.com/caraml-dev/turing/engines/experiment/manager"
 	inproc "github.com/caraml-dev/turing/engines/experiment/plugin/inproc/manager"
+	"github.com/gojek/mlp/api/pkg/auth"
 
 	xpclient "github.com/caraml-dev/xp/clients/management"
 	"github.com/caraml-dev/xp/common/api/schema"
 	common_mq_config "github.com/caraml-dev/xp/common/messagequeue"
 	_config "github.com/caraml-dev/xp/plugins/turing/config"
 	"github.com/caraml-dev/xp/treatment-service/config"
 	"github.com/go-playground/validator/v10"
-	"golang.org/x/oauth2/google"
 )
 
 func init() {
@@ -54,9 +54,6 @@ const xpExperimentConfigSchema = `[
   ]
 ]`
 
-// Default scope for the Google Auth token used for the XP APIs
-var googleOAuthScope = "https://www.googleapis.com/auth/userinfo.email"
-
 // experimentManager implements manager.CustomExperimentManager interface
 type experimentManager struct {
 	validate                     *validator.Validate
@@ -188,7 +185,7 @@ func NewExperimentManager(configData json.RawMessage) (manager.CustomExperimentM
 	}
 
 	// Create Google Client
-	googleClient, err := google.DefaultClient(context.Background(), googleOAuthScope)
+	googleClient, err := auth.InitGoogleClient(context.Background())
 	if err != nil {
 		return nil, err
 	}