Q: How to set User Metal without user_registration_ prefix ?

Hi,

We an add custom field in registration,
which will create custom user meta.

But there is a problem in my case,
The plugin let you enter a key,
like “mykey”,
but it will not name the meta “mykey”:
It will add a prefix, “user_registration_”
the the whole meta name secretly become “user_registration_mykey”.

I would like a way to force meta key absolute name.

Indeed, I used to use another plugin for registration, and I can’t use the same user key name as it used because of this forced prefix addition.

Is there any way to force that,
Or is there a hook to duplicate user_registration_ keys to an absolute value at registration ?

Thx !