oauth2: use client_name as unicode value of clients (#22717)

fargo/oauth2/models.py

@@ -69,6 +69,9 @@ class OAuth2Client(models.Model):
     def check_redirect_uri(self, redirect_uri):
         return redirect_uri in self.redirect_uris.strip().split()
 
+    def __unicode__(self):
+        return self.client_name
+
 
 class OAuth2TempFile(models.Model):
     hash_key = models.CharField(max_length=128, primary_key=True)