Angular Crud application with php mysql

Question

I am new to angular and using version 13, i am trying to create a crud application angular at Frontend and php mysql as backend server, when i am trying to post data from angular app (Localhost:4200) to php mysql db at (localhost:8080) i have write a very simple code and i am successfully able to post data on DB but one problem is while posting data angular app sending an extra blank message, that occupy one more row in my DB, also while post data i am not able to receive response from http server but only a null array.

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api.service.ts

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user.component.ts

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Response on my DB

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My php server to receive response

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