createUserAccount
Creates a new user account for a specified address and list of chains.
Usage
const userId = await orchestrator.createUserAccount(
  '0x1234567890123456789012345678901234567890',
  [8453],
)Parameters
accountAddress
The address of the account to create.
chains
- Type: number[]
The list of chain IDs to create the account on.
Returns
userId
- Type: Promise<string>
The ID of the created user account.