Introduce sso UserEnterpriseAuth model.

awx/sso/models.py

@@ -1,2 +1,26 @@
 # Copyright (c) 2015 Ansible, Inc.
 # All Rights Reserved.
+
+# Django
+from django.db import models
+from django.contrib.auth.models import User
+from django.utils.translation import ugettext_lazy as _
+
+
+class UserEnterpriseAuth(models.Model):
+    """Tower Enterprise Auth association model"""
+
+    PROVIDER_CHOICES = (
+        ('radius', _('RADIUS')),
+        ('tacacs+', _('TACACS+')),
+    )
+
+    class Meta:
+        unique_together = ('user', 'provider')
+
+    user = models.ForeignKey(
+        User, related_name='enterprise_auth', on_delete=models.CASCADE
+    )
+    provider = models.CharField(
+        max_length=32, choices=PROVIDER_CHOICES
+    )