feat(user): support multiple invites

[apoorvdixit88]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

The endpoint /invite_multiple, gives support to invite more than one user at a time.

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

Currently we can only invite one user at a time.

How did you test it?

Curl for invite_multiple:

curl --location 'http://localhost:8080/user/user/invite_multiple' \
--header 'Authorization: Bearer JWT' \
--data-raw '[
    {
    "email": "[email protected]",
    "name": "25",
    "role_id": "merchant_view_only"
},
{
    "email": "[email protected]",
    "name": "25",  
    "role_id": "merchant_view_only"
},
{
    "email": "[email protected]",
    "name": "25",
    "role_id": "merchant_view_only"
}

]'

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable