The auth module only exposes one keeper, the account keeper, which can be used to read and write accounts.
Account Keeper
Presently only one fully-permissioned account keeper is exposed, which has the ability to both read and write all fields of all accounts, and to iterate over all stored accounts.
// AccountKeeperI is the interface contract that x/auth's keeper implements.typeAccountKeeperIinterface {// Return a new account with the next account number and the specified address. Does not save the new account to the store.NewAccountWithAddress(sdk.Context, sdk.AccAddress) types.AccountI// Return a new account with the next account number. Does not save the new account to the store.NewAccount(sdk.Context, types.AccountI) types.AccountI// Check if an account exists in the store.HasAccount(sdk.Context, sdk.AccAddress) bool// Retrieve an account from the store.GetAccount(sdk.Context, sdk.AccAddress) types.AccountI// Set an account in the store.SetAccount(sdk.Context, types.AccountI)// Remove an account from the store.RemoveAccount(sdk.Context, types.AccountI)// Iterate over all accounts, calling the provided function. Stop iteration when it returns true.IterateAccounts(sdk.Context, func(types.AccountI) bool)// Fetch the public key of an account at a specified addressGetPubKey(sdk.Context, sdk.AccAddress) (crypto.PubKey, error)// Fetch the sequence of an account at a specified address.GetSequence(sdk.Context, sdk.AccAddress) (uint64, error)// Fetch the next account number, and increment the internal counter.GetNextAccountNumber(sdk.Context) uint64}