diff --git a/custom_components/crisp/__init__.py b/custom_components/crisp/__init__.py
index 643995f..7410427 100644
--- a/custom_components/crisp/__init__.py
+++ b/custom_components/crisp/__init__.py
@@ -6,7 +6,7 @@
 from __future__ import annotations
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME, Platform
+from homeassistant.const import CONF_EMAIL, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
@@ -28,8 +28,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     hass.data[DOMAIN][entry.entry_id] = coordinator = BlueprintDataUpdateCoordinator(
         hass=hass,
         client=IntegrationBlueprintApiClient(
-            username=entry.data[CONF_USERNAME],
-            password=entry.data[CONF_PASSWORD],
+            email=entry.data[CONF_EMAIL],
             session=async_get_clientsession(hass),
         ),
     )
diff --git a/custom_components/crisp/api.py b/custom_components/crisp/api.py
index a738040..9d40ce7 100644
--- a/custom_components/crisp/api.py
+++ b/custom_components/crisp/api.py
@@ -29,13 +29,11 @@ class IntegrationBlueprintApiClient:
 
     def __init__(
         self,
-        username: str,
-        password: str,
+        email: str,
         session: aiohttp.ClientSession,
     ) -> None:
         """Sample API Client."""
-        self._username = username
-        self._password = password
+        self._email = email
         self._session = session
 
     async def async_get_data(self) -> any:
diff --git a/custom_components/crisp/config_flow.py b/custom_components/crisp/config_flow.py
index a474163..f7fd0d8 100644
--- a/custom_components/crisp/config_flow.py
+++ b/custom_components/crisp/config_flow.py
@@ -3,7 +3,7 @@
 
 import voluptuous as vol
 from homeassistant import config_entries
-from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_EMAIL
 from homeassistant.helpers import selector
 from homeassistant.helpers.aiohttp_client import async_create_clientsession
 
@@ -17,21 +17,30 @@
 
 
 class BlueprintFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
-    """Config flow for Blueprint."""
+    """Config flow for Crisp."""
 
     VERSION = 1
+    MINOR_VERSION = 1
 
     async def async_step_user(
         self,
-        user_input: dict | None = None,
+        info: dict | None = None,
     ) -> config_entries.FlowResult:
-        """Handle a flow initialized by the user."""
+        """Handle a flow initialized by the user: initial setup"""
         _errors = {}
-        if user_input is not None:
+        if info is not None:
+            # TODO: validate email? is there some function for that?
+
+            # TODO: switch to the Crisp userid which is more stable? Or at least make email lowercase
+            # Set unique id of this config flow to the entered email
+            await self.async_set_unique_id(info[CONF_EMAIL])
+            # Ensure config flow can only be done once for this email
+            self._abort_if_unique_id_configured()
+
             try:
+                # TODO: call Crisp api to request code, handle response
                 await self._test_credentials(
-                    username=user_input[CONF_USERNAME],
-                    password=user_input[CONF_PASSWORD],
+                    email=info[CONF_EMAIL],
                 )
             except IntegrationBlueprintApiClientAuthenticationError as exception:
                 LOGGER.warning(exception)
@@ -44,8 +53,8 @@ async def async_step_user(
                 _errors["base"] = "unknown"
             else:
                 return self.async_create_entry(
-                    title=user_input[CONF_USERNAME],
-                    data=user_input,
+                    title=info[CONF_EMAIL],
+                    data=info,
                 )
 
         return self.async_show_form(
@@ -53,16 +62,11 @@ async def async_step_user(
             data_schema=vol.Schema(
                 {
                     vol.Required(
-                        CONF_USERNAME,
-                        default=(user_input or {}).get(CONF_USERNAME),
+                        CONF_EMAIL,
+                        default=(info or {}).get(CONF_EMAIL),
                     ): selector.TextSelector(
                         selector.TextSelectorConfig(
-                            type=selector.TextSelectorType.TEXT
-                        ),
-                    ),
-                    vol.Required(CONF_PASSWORD): selector.TextSelector(
-                        selector.TextSelectorConfig(
-                            type=selector.TextSelectorType.PASSWORD
+                            type=selector.TextSelectorType.EMAIL
                         ),
                     ),
                 }
@@ -70,11 +74,10 @@ async def async_step_user(
             errors=_errors,
         )
 
-    async def _test_credentials(self, username: str, password: str) -> None:
+    async def _test_credentials(self, email: str) -> None:
         """Validate credentials."""
         client = IntegrationBlueprintApiClient(
-            username=username,
-            password=password,
+            email=email,
             session=async_create_clientsession(self.hass),
         )
         await client.async_get_data()
diff --git a/custom_components/crisp/translations/en.json b/custom_components/crisp/translations/en.json
index 71cdb6d..999050b 100644
--- a/custom_components/crisp/translations/en.json
+++ b/custom_components/crisp/translations/en.json
@@ -2,13 +2,15 @@
     "config": {
         "step": {
             "user": {
-                "description": "If you need help with the configuration have a look here: https://github.com/NLthijs48/home-assistant-crisp",
+                "description": "Enter your email adress used for your Crisp account.",
                 "data": {
-                    "username": "Username",
-                    "password": "Password"
+                    "email": "Email"
                 }
             }
         },
+        "abort": {
+            "already_configured": "Crisp account with that email is already configured."
+        },
         "error": {
             "auth": "Username/Password is wrong.",
             "connection": "Unable to connect to the server.",