Button to regenerate API key

Closes #1967

changedetectionio/__init__.py

@@ -819,6 +819,16 @@ def changedetection_app(config=None, datastore_o=None):
 
         return output
 
+    @app.route("/settings/reset-api-key", methods=['GET'])
+    @login_optionally_required
+    def settings_reset_api_key():
+        import secrets
+        secret = secrets.token_hex(16)
+        datastore.data['settings']['application']['api_access_token'] = secret
+        datastore.needs_write_urgent = True
+        flash("API Key was regenerated.")
+        return redirect(url_for('settings_page')+'#api')
+
     @app.route("/import", methods=['GET', "POST"])
     @login_optionally_required
     def import_page():

changedetectionio/templates/settings.html

@@ -178,6 +178,9 @@ nav
                         <span style="display:none;" id="api-key-copy" >copy</span>
                     </div>
                 </div>
+                <div class="pure-control-group">
+                    <a href="{{url_for('settings_reset_api_key')}}" class="pure-button button-small button-cancel">Regenerate API key</a>
+                </div>
             </div>
             <div class="tab-pane-inner" id="proxies">
                 <div id="recommended-proxy">