postman test BearerFormat = "JWT"

**Describe the issue**
Lack of documentation. I would love if someone shows me the postman call to test:

```c#
[OpenApiSecurity("user_auth_header", SecuritySchemeType.Http, Scheme = OpenApiSecuritySchemeType.Bearer, BearerFormat = "JWT", Name = "Authorization")]
```

Start by reproducing the OpenAPI security definition shown in the issue and determine the Postman request needed for a Bearer token with JWT format. Document the request and Authorization header example so the documented call can test this configuration.

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