Function no_verify_signatures 

pub fn no_verify_signatures() -> FnOptionArg

Verify that the tip commit of the side branch being merged is signed with a valid key, i.e. a key that has a valid uid: in the default trust model, this means the signing key has been signed by a trusted key. If the tip commit of the side branch is not signed with a valid key, the merge is aborted. –verify-signatures, –no-verify-signatures