pub fn decode_data(
  data: Dynamic,
) -> Result(Dict(String, String), List(DecodeError))

pub fn decode_data_from_string(
  str: String,
) -> Result(Dict(String, String), DecodeError)

pub fn decode_session_row(
  data: Dynamic,
) -> Result(
  #(String, #(#(Int, Int, Int), #(Int, Int, Int)), String),
  List(DecodeError),
)

pub fn encode_data(data: Dict(String, String)) -> Json

pub fn migrate_down(
  db: Connection,
) -> Result(Returned(Nil), QueryError)

pub fn migrate_up(
  db: Connection,
) -> Result(Returned(Nil), QueryError)

pub fn try_create_session_store(db: Connection) -> SessionStore