NFT class Issue

Use this helper to create (issue) a new NFT class. A NFT class name has to be unique: first frozen by the cycle, first served.
The recipient of the transaction is the cycle account.
If you send an invalid transaction, you would lose the Nyzos and no NFT class would be created.
Lowercase 'n', followed by at least 2 chars uppercase, A..Z 0..9 _ Only. Max length is 11
Enter -1 for no max supply. No space nor thousand separator