Saving scope limits with SetUserPermissionLimits() fails

[ripienaar]

If we apply the following patch to Test_ScopedPermissionsMaxPayload which should be identical we get a failure:

diff --git a/tests/accounts_test.go b/tests/accounts_test.go
index 7fcac89..c51b0e0 100644
--- a/tests/accounts_test.go
+++ b/tests/accounts_test.go
@@ -203,7 +203,14 @@ func (t *ProviderSuite) Test_ScopedPermissionsMaxPayload() {
 	auth, _, a := setupTestWithOperatorAndAccount(t)
 	s, err := a.ScopedSigningKeys().AddScope("admin")
 	t.NoError(err)
-	t.NoError(s.SetMaxPayload(101))
+
+	type limitsManager interface {
+		SetUserPermissionLimits(limits jwt.UserPermissionLimits) error
+	}
+	limits := jwt.UserPermissionLimits{}
+	limits.Payload = 101
+	t.NoError(s.(limitsManager).SetUserPermissionLimits(limits))
+
 	t.Equal(int64(101), s.MaxPayload())
 	t.NoError(auth.Commit())
 
@@ -215,9 +222,9 @@ func (t *ProviderSuite) Test_ScopedPermissionsMaxPayload() {
 	a, err = o.Accounts().Get("A")
 	t.NoError(err)
 
-	scopes, err := a.ScopedSigningKeys().GetScopeByRole("admin")
+	scope, err := a.ScopedSigningKeys().GetScope(s.Key())
 	t.NoError(err)
-	t.Equal(int64(101), scopes[0].MaxPayload())
+	t.Equal(int64(101), scope.MaxPayload())
 }
 
 func (t *ProviderSuite) Test_ScopedPermissionsMaxData() {