remove User from createClient (they are created for Sites, not Users)

app/services/oauth2.js

@@ -153,13 +153,11 @@ class OAuth2Service extends SiteService {
 
   /**
    * Creates a new OAuth2 client, and generates a Client ID and Secret for it.
-   * @param {User} user The authenticated user issuing the request to create an
-   * "app" for use when calling DTP APIs.
    * @param {Document} clientDefinition The definition of the client to be
    * created including the name and domain of the node.
    * @returns new client instance with valid _id.
    */
-  async createClient (user, clientDefinition) {
+  async createClient (clientDefinition) {
     const NOW = new Date();
     const PASSWORD_LEN = parseInt(process.env.DTP_CORE_AUTH_PASSWORD_LEN || '64', 10);
 
@@ -180,9 +178,8 @@ class OAuth2Service extends SiteService {
 
     this.log.info('new OAuth2 client created', {
       clientId: client._id,
-      owner: user._id,
-      node: client.node.name,
-      domain: client.node.domain,
+      site: client.site.name,
+      domain: client.site.domain,
     });
 
     return client.toObject();