some optimization for admin api key, create tenant and reset-encrypt-key-pair command (#3013)

Co-authored-by: jyong <jyong@dify.ai>

api/libs/login.py

@@ -53,7 +53,7 @@ def login_required(func):
     def decorated_view(*args, **kwargs):
         auth_header = request.headers.get('Authorization')
         admin_api_key_enable = os.getenv('ADMIN_API_KEY_ENABLE', default='False')
-        if admin_api_key_enable:
+        if admin_api_key_enable.lower() == 'true':
             if auth_header:
                 if ' ' not in auth_header:
                     raise Unauthorized('Invalid Authorization header format. Expected \'Bearer <api-key>\' format.')