> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/drift-labs/protocol-v2/llms.txt
> Use this file to discover all available pages before exploring further.

# User Instructions

> User account management instructions in Drift Protocol

User instructions handle account creation, collateral management, and user settings.

## Core Instructions

### initialize\_user

Creates a new user trading account.

```rust theme={null}
pub fn initialize_user(
    ctx: Context<InitializeUser>,
    sub_account_id: u16,
    name: [u8; 32],
) -> Result<()>
```

<ParamField path="sub_account_id" type="u16" required>
  Sub-account ID (0-9999) for portfolio segregation
</ParamField>

<ParamField path="name" type="[u8; 32]" required>
  User account name (32 bytes)
</ParamField>

### deposit

Deposits collateral into user account.

```rust theme={null}
pub fn deposit(
    ctx: Context<Deposit>,
    market_index: u16,
    amount: u64,
    reduce_only: bool,
) -> Result<()>
```

### withdraw

Withdraws collateral from user account.

```rust theme={null}
pub fn withdraw(
    ctx: Context<Withdraw>,
    market_index: u16,
    amount: u64,
    reduce_only: bool,
) -> Result<()>
```

## SDK Usage

See the SDK guides for TypeScript usage:

<CardGroup cols={2}>
  <Card title="Account Management" href="/guides/account-management">
    Create and manage accounts
  </Card>

  <Card title="DriftClient API" href="/api/drift-client">
    Client methods
  </Card>
</CardGroup>