With OPE, we have new credentials types(SSI). But we should allow more users to create their own types (LDAP, NTLM, Active Directory, Oauth, etc).
Of course, node cannot handle those types, so we need to change the logic.

Flow:

• if POLICY_SERVER_URL exists, then ocean-node will NOT perform any checks. It will just use the existing code and let PolicyServer decide.
• if POLICY_SERVER_URL is not defined then ocean-node will perform checks only for 'known' types. The remaining rules WILL BE IGNORED!

Known types:

• address - web3 address
• accessList - accessList contract (see Credentials: NFT list #808)