Le bouton est maintenant en vert, moins confusant.

templates/registration/login.html

@@ -45,7 +45,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 <p><form method="post" action="{% url 'login' %}">
     {% csrf_token %}
     {% bootstrap_form form %}
-    {% bootstrap_button "Login" button_type="submit" icon="log-in" %}
+    <button class="btn btn-success" type="submit"><span class="glyphicon glyphicon-log-in"></span> Login</button>
     <input type="hidden" name="next" value="{{ next }}" />
 </form></p>
 <p><a class="btn btn-warning btn-sm" role="button" href="{% url 'users:reset-password' %}"> Mot de passe oublié ?</a></p>