Request help on REST API explorer

[Supriya25]

Hi all,

I logged in with system admin
I'm trying  to read cmdb data so that through rest api explorer I got this url  , got 200 in rest api explorer 
https://dev345157.service-now.com/api/now/table/cmdb_ci?sysparm_limit=5

the above same url using in next tab of my active instance , it is giving below error . very surprising 

<response>

<error>

<detail>Required to provide Auth information</detail>

<message>User is not authenticated</message>

</error>

<status>failure</status>

</response>


this is from postman 

[Ankur Bawiskar]

@Supriya25 

so from REST API explorer it's working but not from postman?

Is MFA enabled for that admin user?

if yes that could be the reason it's not working from postman

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