api_client: create from_env factory

Author: aviau

flareio/api_client.py

@@ -1,3 +1,4 @@
+import os
 import requests
 
 from datetime import datetime
@@ -31,6 +32,15 @@ def __init__(
         self._api_token_exp: t.Optional[datetime] = None
         self._session = session or self._create_session()
 
+    @classmethod
+    def from_env(cls) -> t.Self:
+        api_key: str = os.environ["FLARE_API_KEY"]
+        tenant_id: t.Optional[str] = os.environ.get("FLARE_TENANT_ID")
+        return cls(
+            api_key=api_key,
+            tenant_id=int(tenant_id) if tenant_id is not None else None,
+        )
+
     @staticmethod
     def _create_session() -> requests.Session:
         session = requests.Session()