Identify user who triggered flow from power pages?

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Posted on by AJ-09040936-0

The power pages site I'm building requires you to be logged in, and I want a button that the user can press to trigger a flow. I want the flow to identify who the user/contact is. Is this possible? I'm currently triggering a flow (trigger is When Power pages calls a flow) it via javascript, which works, and I figure I could pass the user id via liquid, but that would expose both the url for the api endpoint and the user id, which would probably mean it can be replayed, with different user ids, which is clearly not suitable.

Any other ways to make this flow work?

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Design & build

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SaiRT14 1,990 Super User 2025 Season 2 on at

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Hi CU23011641-0

Yes, you're on the right track considering the security implications when dealing with user identification.

Create Power Automate flow

HTTP Request Trigger: Set up a flow to trigger when it receives an HTTP request:

{
"type": "object",
"properties": {
"userId": { "type": "string" },
"otherData": { "type": "string" }
}
}

JavaScript to Trigger Flow: In your Power Pages custom button, use JavaScript to send the authentication token securely to the flow:

fetch('https://your-logic-app-or-flow-url', {
method: 'POST',
headers: {
'Authorization': `Bearer ${accessToken}`, // Add the OAuth2 token here
'Content-Type': 'application/json'
},
body: JSON.stringify({
userId: getUserId(), // Get the user ID securely
otherData: 'some data'
})
}).then(response => {
// Handle the response from Power Automate
}).catch(error => {
// Handle errors
});

pls try and let me know.

thanks

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Nagesh Microsoft Employee on at

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The cloud flow that got triggered from Power Pages, by default includes the contact id, web site id and site url. These parameters do not need to pass from client side and can easily track who initiated the flow

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