Function spl_governance::instruction::add_signatory

pub fn add_signatory(
    program_id: &Pubkey, 
    proposal: &Pubkey, 
    token_owner_record: &Pubkey, 
    governance_authority: &Pubkey, 
    payer: &Pubkey, 
    signatory: &Pubkey
) -> Instruction

Creates AddSignatory instruction