Macro validify::field_err

macro_rules! field_err {
    ($code:literal) => { ... };
    ($code:literal, $message:literal) => { ... };
    ($field:literal, $code:literal, $message:literal) => { ... };
}

Creates a new field validation error. Serves as a shorthand for writing out errors for custom functions and schema validations. Accepts:

• ("code")
• ("code", "message")
• ("field_name", "code", "custom message")