@sheetal_warbhuvan Welcome to the community
You may want to check the following:
- the header key name
x-tyk-authorization
is not misspelt - the gateway secret is correct and is not being overridden via environment variables.
- domain and port are for the correct gateway
If you haven’t changed or overridden the value, then you should get the warning displaying a change of the secret is needed
level=warning msg="Default secret should be changed for production." config.secret=352d20ee67be67f6340b4c0605b044b7 prefix=checkup
If you are on Kubernetes or using operator then this topic may be useful.
Hope this helps.