Add Dropbox as an auth provider. (#164)

Related to: CU-86b2dtdj2

arcade/arcade/core/auth.py

@@ -35,6 +35,12 @@ class Discord(OAuth2):
     provider_id: str = "discord"
 
 
+class Dropbox(OAuth2):
+    """Marks a tool as requiring Dropbox authorization."""
+
+    provider_id: str = "dropbox"
+
+
 class Google(OAuth2):
     """Marks a tool as requiring Google authorization."""
 

arcade/arcade/sdk/auth/__init__.py

@@ -1,5 +1,6 @@
 from arcade.core.auth import (
     Discord,
+    Dropbox,
     GitHub,
     Google,
     LinkedIn,
@@ -13,6 +14,7 @@ from arcade.core.auth import (
 
 __all__ = [
     "Discord",
+    "Dropbox",
     "GitHub",
     "Google",
     "LinkedIn",