Transaction Launcher: Avoid log on Authentication or bypass by defaulting a generic username and password

Dear Mates,

Please find the requirement below,

Due to limited users in ECC system, When launching an ECC transaction from CRM Web UI using Transaction Launcher functionality, the framework is prompting to enter user name and password. Now I need to either avoid user authentication or bypass by defaulting a generic username and password.

I tried passing sap user id and password in ITS URL, but not no luck

Could any one share their valuable comments on this issue?

Thanks,

Raja