Is 256 a safe max length for a user_id?

I’m creating an index in my DB for the Auth0 user_id: {identityProviderId}|{UserIdFromIdentityProvider} I’m using Facebook, Instagram, and Google as providers. 256 should be long enough, right?

20 Nov 2019 ... I'm using Facebook, Instagram, and Google as providers. ... a user_id in the form of {identity provider identifier}|{user identifier from identity provider} . ... As I understand it, these are the unique IDs of users in the Auth0 system.

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