Add API key url to step description in TRMNL (#165614)

homeassistant/components/trmnl/config_flow.py

@@ -22,6 +22,8 @@ from .const import DOMAIN, LOGGER
 
 STEP_USER_SCHEMA = vol.Schema({vol.Required(CONF_API_KEY): str})
 
+TRMNL_ACCOUNT_URL = "https://trmnl.com/account"
+
 
 class TRMNLConfigFlow(ConfigFlow, domain=DOMAIN):
     """TRMNL config flow."""
@@ -66,6 +68,7 @@ class TRMNLConfigFlow(ConfigFlow, domain=DOMAIN):
             step_id="user",
             data_schema=STEP_USER_SCHEMA,
             errors=errors,
+            description_placeholders={"account_url": TRMNL_ACCOUNT_URL},
         )
 
     async def async_step_reauth(

homeassistant/components/trmnl/strings.json

@@ -21,7 +21,8 @@
         },
         "data_description": {
           "api_key": "The API key for your TRMNL account."
-        }
+        },
+        "description": "You can find your API key on [your TRMNL account page]({account_url})."
       }
     }
   },