Odata service user creds will not not save.

Hi Team,

Am trying to buid few Excel sheet with Odata Connections from a cloud system.

Where am able to establish the connections , extract data and transform load.

But when i open my excel next day, now its authentication is failed.  But if i hit same query from Post man with same creds it works fine. 

This is a test case for integrating to PowerBI Dashboard directly with out clud systems.

and re-set the entire query again with new creads.

Kindly share some answers.

Thanks in advance.