I can't disable my SIP

hello, I'm trying to disable my SIP but i always get this error:

csrutil: failed to set credential: Error Domain=com.apple.LocalAuthentication Code=-1 "Password rejected (3)" UserInfo={NSLocalizedDescription=Password rejected (3), NSUnderlyingError=0x1580053b0 {Error Domain=com.apple.LocalAuthentication Code=-1 "User not found" UserInfo={NSLocalizedDescription=User not found}}} (additional failure: Error Domain=com.apple.LocalAuthentication Code=-1004 "User interaction is required." UserInfo={BiometryType=1, NSLocalizedDescription=User interaction is required., AvailableMechanisms=( 2 )}) csrutil: Failed to authenticate.

i entered my username and password correctly but i still get the error. how do i fix this? thanks.