Changes to GET /near-nft/users/:userId/owned-tokens

the security scope near-nft:read was removed from the endpoint's security scheme collabLandOAuth2

the endpoint scheme security apiKey AND authenticatedEncryption AND ethereum AND collabLandOAuth2 was added to the API

the endpoint scheme security apiKey AND authenticatedEncryption AND ethereum AND collabLandOAuth2 AND discordOAuth2 was removed from the API

added the optional property items/items/classifierGroup to the response with the 200 status