Allow to add more than one OAuth provider

umap/templates/auth/user_form.html

@@ -19,5 +19,30 @@
         <input type="submit" value="{% trans 'Save' %}" />
       </form>
     </div>
+    <div class="row">
+      <h3>{% trans "Your current providers" %}</h3>
+      <ul>
+        {% for name in providers %}<li>{{ name|title }}</li>{% endfor %}
+      </ul>
+    </div>
+    <div class="row">
+      <h3>{% trans "Connect to another provider" %}</h3>
+      <p>
+        {% blocktrans %}It's a good habit to connect your account to more than one provider, in case one provider becomes unavailable, temporarily or even permanently.{% endblocktrans %}
+      </p>
+      <div>
+        <ul class="login-grid block-grid">
+          {% for name in backends.backends %}
+            {% if name not in providers %}
+              <li>
+                <a href="{% url "social:begin" name %}"
+                   class="umap-login-popup login-{{ name }}"
+                   title="{{ name|title }}"></a>
+              </li>
+            {% endif %}
+          {% endfor %}
+        </ul>
+      </div>
+    </div>
   </div>
 {% endblock maincontent %}

umap/views.py

@@ -168,11 +168,17 @@ about = About.as_view()
 class UserProfile(UpdateView):
     model = User
     form_class = UserProfileForm
-    success_url = reverse_lazy('user_profile')
+    success_url = reverse_lazy("user_profile")
 
     def get_object(self):
         return self.get_queryset().get(pk=self.request.user.pk)
 
+    def get_context_data(self, **kwargs):
+        kwargs.update(
+            {"providers": self.object.social_auth.values_list("provider", flat=True)}
+        )
+        return super().get_context_data(**kwargs)
+
 
 user_profile = UserProfile.as_view()