Error when i try to enter to /wp-admin

Moved to Fixing WordPress, this is not an Everything else WordPress topic.

I’ve redacted the malware you posted, your site is hacked.

Please remain calm and give this a good read.

https://wordpress.org/support/article/faq-my-site-was-hacked/

When you have successfully deloused your site then consider giving this a read too.

https://wordpress.org/support/article/hardening-wordpress/