# 6. The start_session method¶

This call is optional and it’s not part of any flow.

## 6.1. Required Inputs¶

<start_session>
<user_id>demo</user_id>
<user_passwd>demopass</user_passwd>
</start_session>


## 6.2. Output Data¶

A crypto_block to confirm the operation was success.

<start_session_result>
<crypto_block>M_--qRfq64CDfM9Vj4JBQdRMdOJPW0xEpX1WsPqJY6Sy_XkrL
_G8x-0i4sQu1cKhPNF-2PkEozP_rOW8KEiQSB10ZOO5hkKzT1OUz6IdkZ5DnW4D
XoVa_AwIc0--Y</crypto_block>
</start_session_result>


Warning

CryptoBlocks are provided by the system as part of a flow so they may change on every step of each flow. They should not be used to store state. see CryptoBlock