permissions to access linkedin's users profile

I have tried to access #linkedIn's users profile using the links-https://api.linkedin.com/v2/me?projection=(id,firstName,lastName) and https://api.linkedin.com/v2/me both but got the error-

{ "serviceErrorCode": 100, "message": "Not enough permissions to access: GET /me", "status": 403 }

I have client id, secret id and able to generate authorization code and access token using the Apis for that I am following this doc- https://docs.microsoft.com/en-us/linkedin/shared/authentication/authorization-code-flow?view=li-lms-2022-08&tabs=HTTPS for step4, I am unable to access #linkedIn's users profile. If need permissions, please #linkedIn community give me the same and for further contact, DM me on this email-id - vkg6614@gmail.com . I want to access the users profile for https://upskilltalent.com/ this company

for better understanding please go through this doc-- https://docs.microsoft.com/en-us/linkedin/shared/authentication/authorization-code-flow?view=li-lms-2022-08&tabs=HTTPS

Thanks in advance