How to access value of userPass from array of object ?

Question

How to access value of userPass from array of object using angular 7?

I need to access Property userPass from array of object 

I have variable from type any his name auth 

auth have array of object

I need to access property value from userpass

auth is

[{"userLoginID":0,"userName":"test","userMail":"[email protected]","userPass":"12345678","fkTeamID":0

,"isAdmin":false,"createdBy":0,"createdDate":"0001-01-01T00:00:00","isHidden":false}]

I need to access userPass value meaning i need to access 12345678

so what i do to make that please using angular 7

thanks