'.NET/EF Core - simple identity

Is it okay to do the identity without using ASP.NET Core Identity? I ask because registration for me is teaking data from user, hash password and put data with hashed password to data base, but at tutorial i can see tones of atomic operations, that i dont't need or i don't know that i need... Is this way of user registraction is correct or shoud I use ASP.NET Core Identity For safety reasons or something? Will you tell me what shoud i know about registration and validation in .NET?



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