updates sdk params + rename functions

[arch1995]

Motivation and Context

Jira Link: https://toruslabs.atlassian.net/browse/PD-4666

Description

• Rename authenticateUser to getIdentityToken.
• Adds mfaLevel in web3authConstructor.
• updates examples.

How has this been tested?

Devrels tested this

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project. (run lint)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code requires a db migration.

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Name	Status	Preview	Comments	Updated (UTC)
web3auth-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2025 0:17am

[chaitanyapotti]

lgtm