print first name and last name if available

issue/models.py

@@ -18,6 +18,7 @@ import json
 from issue.templatetags.issue_tags import *
 
 
+@python_2_unicode_compatible
 class User(AbstractUser):
 
     @property
@@ -25,6 +26,12 @@ class User(AbstractUser):
         query = Q(groups__in=self.groups.all()) | Q(users=self)
         return Team.objects.filter(query)
 
+    def __str__(self):
+        if self.first_name and self.last_name:
+            return self.first_name + ' ' + self.last_name
+        else:
+            return self.username
+
 
 @python_2_unicode_compatible
 class Project(models.Model):