Function spl_token::instruction::set_authority

pub fn set_authority(
    token_program_id: &Pubkey, 
    owned_pubkey: &Pubkey, 
    new_authority_pubkey: Option<&Pubkey>, 
    authority_type: AuthorityType, 
    owner_pubkey: &Pubkey, 
    signer_pubkeys: &[&Pubkey]
) -> Result<Instruction, ProgramError>

Creates a SetAuthority instruction.