erDiagram
    User ||--o{ Cred : "has credentials"
    User ||--o| Verify : "has verification"
    User ||--o| Profile : "has profile"
    User ||--o{ Follow : "follows"
    User ||--o{ Follow : "followed by"

    %% Cross-schema: defined in full in media.mmd / brewery.mmd / beer.mmd
    Profile ||--o{ Avatar : "has avatar history"
    User ||--o{ Photo : "uploads"
    User ||--o{ Brewery : "posts"
    User ||--o{ Beer : "posts"
    User ||--o{ BeerComment : "comments"

    User {
        uniqueidentifier UserAccountID PK
        varchar Username UK
        nvarchar FirstName
        nvarchar LastName
        varchar Email UK
        datetime CreatedAt
        datetime UpdatedAt "nullable"
        date DateOfBirth
    }

    Cred {
        uniqueidentifier UserCredentialID PK
        uniqueidentifier UserAccountID FK
        datetime CreatedAt
        datetime Expiry
        nvarchar Hash
        bit IsRevoked
        datetime RevokedAt "nullable"
    }

    Verify {
        uniqueidentifier UserVerificationID PK
        uniqueidentifier UserAccountID "FK, UK"
        datetime VerificationDateTime
    }

    Profile {
        uniqueidentifier UserProfileID PK
        uniqueidentifier UserAccountID "FK, UK"
        nvarchar Biography
    }

    Follow {
        uniqueidentifier UserFollowID PK
        uniqueidentifier UserAccountID FK
        uniqueidentifier FollowingID FK
        datetime CreatedAt
    }