How to reactivate API credentials and keep them active for longer?

Hello!

I registered an API access at https://eu.api.ovh.com/ to allow Let'sEncrypt to automatically renew DNS based wildcard certificates. However that access has stopped working, seemingly out of the blue.

Using /me/api/credential/{credentialid} I can get the following information out:

{
"rules": [
{
"method": "GET",
"path": "/domain/zone/*"
},
{
"path": "/domain/zone/*",
"method": "POST"
},
{
"path": "/domain/zone/*",
"method": "PUT"
},
{
"path": "/domain/zone/*/record/*",
"method": "DELETE"
}
],
"status": "validated",
"applicationId": 71333,
"credentialId": 460480972,
"ovhSupport": false,
"creation": "2019-02-18T00:52:43+01:00",
"lastUse": null,
"expiration": "2019-02-19T00:52:43+01:00"
}

From that it looks like the API access was only valid for a single day when I created it.
So my question is, how can I reactivate it and keep it active for longer (optimally indefinitely)?

Thanks in advance

PS: If this is the wrong forum feel free to move me around. I was directed here by regular OVH email support who said this question was out of scope.