misc: migrate to vuetify 2.0 (wip)

client/graph/admin/users/users-mutation-create.gql

@@ -0,0 +1,12 @@
+mutation ($providerKey: String!, $email: String!, $name: String!, $passwordRaw: String, $groups: [Int]!, $mustChangePassword: Boolean, $sendWelcomeEmail: Boolean) {
+  users {
+    create(providerKey: $providerKey, email: $email, name: $name, passwordRaw: $passwordRaw, groups: $groups, mustChangePassword: $mustChangePassword, sendWelcomeEmail: $sendWelcomeEmail) {
+      responseResult {
+        succeeded
+        errorCode
+        slug
+        message
+      }
+    }
+  }
+}