# signin

The signin() method for the SurrealDB Swift SDK signs in to a specific authentication level.

Signs this connection in to a specific authentication level and returns the issued tokens.

```swift title="Method Syntax"
let tokens = try await client.signin(credentials)
```

## Arguments

<table>
    <thead>
        <tr>
            <th colspan="2" scope="col">Arguments</th>
            <th colspan="2" scope="col">Description</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td colspan="2" scope="row" data-label="Arguments">
                <code>credentials</code>
                <label label="required" />
            </td>
            <td colspan="2" scope="row" data-label="Description">
                The credentials to authenticate with: one of <code>.root</code>, <code>.namespace</code>, <code>.database</code>, <code>.accessVariables</code> or <code>.accessBearer</code>.
            </td>
        </tr>
    </tbody>
</table>

## Example usage

```swift
// Root user
let tokens = try await client.signin(.root(username: "root",
    password: "secret"))

// Database user
let tokens = try await client.signin(.database(
    namespace: "myapp",
    database: "mydb",
    username: "db_user",
    password: "secret"
))

// Record access with variables
let tokens = try await client.signin(.accessVariables(
    namespace: "myapp",
    database: "mydb",
    access: "account",
        variables: ["email": .string("user@example.com"),
        "pass": .string("secret")]
))
```

See [Authentication](/docs/reference/swift/concepts/authentication.md) for every supported credentials variant.