Tutorial jwt auth really needed for All

i need auth with jwt using http post angular but tutorial about it not usfull and i see several topic about it that not clear and some of theme without answer

i have a request, i want pro dev to make a tutorial for work with auth jwt with http angular that clear and explane about data , header (most problem in topic), security (Important) and other option

i think it’s really need, and its a security part that must noticeably .