Symfony 6.4 - Authenticator does not support the request

I have a Symfony 6.4 (with Api Platform v3.4.5) project. I have a controller that accepts a JSON. The controller picks up the arguments passed via the JSON and calls a Symfony Command with these arguments. The Symfony Command in-turn calls an external API with these arguments obtains a JSON response, parses it and returns it back to the controller.

I tested the Command and obtained the correct results. However when I use CURL and call the controller I get a blank response. I see the following entries in the log

[2025-05-10T20:23:04.219748+05:30] security.DEBUG: Checking for authenticator support. {"firewall_name":"main","authenticators":1} []
[2025-05-10T20:23:04.219814+05:30] security.DEBUG: Checking support on authenticator. {"firewall_name":"main","authenticator":"Symfony\\Component\\Security\\Http\\Authenticator\\FormLoginAuthenticator"} []
[2025-05-10T20:23:04.219849+05:30] security.DEBUG: Authenticator does not support the request. {"firewall_name":"main","authenticator":"Symfony\\Component\\Security\\Http\\Authenticator\\FormLoginAuthenticator"} []

In my security.yaml file I have the following entries

security:
    password_hashers:
        Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface: 'auto'
    providers:
        # used to reload user from session & other features (e.g. switch_user)
        app_user_provider:
            entity:
                class: App\Entity\User
                property: username
    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt)|css|images|js)/
            security: false
        main:
            lazy: true
            provider: app_user_provider
            form_login:
                login_path: app_login
                check_path: app_login
                enable_csrf: true
            logout:
                path: app_logout
                # where to redirect after logout
                # target: app_any_route

            # activate different ways to authenticate
            # https://symfony.com/doc/current/security.html#the-firewall

            # https://symfony.com/doc/current/security/impersonating_user.html
            # switch_user: true
            # configure the maximum login attempts
            login_throttling:
                max_attempts: 3          # per minute ...
                # interval: '15 minutes' # ... or in a custom period
            #access_token:
                #token_handler: App\Security\AccessTokenHandler

    # Easy way to control access for large sections of your site
    # Note: Only the *first* access control that matches will be used
    access_control:
        # - { path: ^/admin, roles: ROLE_ADMIN }
        # - { path: ^/profile, roles: ROLE_USER }

I am in the DEV environment. My security.yaml indicates that the security is disabled for DEV. Is there any additional configuration needed before my controllers can be accessed over HTTP.