Getting a http 401 code - What's the best way to fix unauthorized access? or Why am I seeing a http 4

Ugh, http 401 code is the worst. One thing that tripped me up: case-sensitive credentials.

Like, if your password has uppercase letters and you’re typing it lowercase in the request headers, boom—401.

Also, some APIs need a `Bearer` prefix for tokens. Miss that tiny detail, and you’re locked out.