Type Alias add_username_authority

add_username_authority: TxDescriptor<{
    allocation: number;
    authority: MultiAddress;
    suffix: Binary;
}>

Add an AccountId with permission to grant usernames with a given suffix appended.

The authority can grant up to allocation usernames. To top up the allocation or change the account used to grant usernames, this call can be used with the updated parameters to overwrite the existing configuration.