const REQUESTOR_TOKEN_REGEX: &str = r"^[a-z0-9A-Z]{20}$";
The regex pattern for a RequestorToken
RequestorToken
https://github.com/privacybydesign/irmago/blob/b1c38f4f2c9da3d3f39b5c21a330bcbd04143f41/internal/common/common.go#L39