Token-based and API key-based authentication

To use access token authorization:

Provide the credential (Authorization) details in the ociconfig.properties file, as per your respective provider.
Update Authorization header Bearer value. Here <token> is just for reference.
You can also authorize via api_key.
For example:
```
[AUTH]
Authorization=api_key <value>
```

Import the necessary certificates if required in your environment or as mandated by the provider.

Provider ociconfig.properties

OCI

Provider	ociconfig.properties
OCI	`[AUTH] user=<oci_user_id> fingerprint=<oci_user_finger_print> tenancy=<tenancy_id> region=<region> key_file=<.pem file path>`
OpenAI	`[AUTH] Authorization=Bearer <token>`
Google	`[AUTH] Authorization=Bearer <token> X-goog-user-project=<project_id>`

[AUTH]
user=<oci_user_id>
fingerprint=<oci_user_finger_print>
tenancy=<tenancy_id>
region=<region>
key_file=<.pem file path>

OpenAI

[AUTH]
Authorization=Bearer <token>

Google

[AUTH]
Authorization=Bearer <token>
X-goog-user-project=<project_id>