add fetching credentials from metadata to provider (#171)

Author: natalysheinin

go.mod

@@ -3,9 +3,10 @@ module github.com/DeviaVir/terraform-provider-gsuite
 go 1.15
 
 require (
+	cloud.google.com/go v0.79.0
 	github.com/hashicorp/terraform-plugin-sdk v1.13.0
 	github.com/pkg/errors v0.9.1
 	github.com/sethvargo/go-password v0.1.3
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-	google.golang.org/api v0.25.0
+	golang.org/x/oauth2 v0.0.0-20210313182246-cd4f82c27b84
+	google.golang.org/api v0.44.0-impersonate-preview
 )