Require registration by mail link.

templates/create_user.html

@@ -35,6 +35,13 @@
             </label>
         </div>
         
+        <div class="form-group">
+            <label class="checkbox-container">
+                <input type="checkbox" name="auto_verify"> Auto-verify (skip email verification)
+                <span class="checkmark"></span>
+            </label>
+        </div>
+        
         <div class="form-group">
             <button type="submit" class="btn btn-success">Create User</button>
             <a href="{{ url_for('admin_users') }}" class="btn btn-secondary">Cancel</a>