Shan you are my hero! 
I got it, i am able to see my own messages, although no data is shown, but doesn’t matter, it already works.
My mistake was:
https://www.media-junkie.com/http-test/_functions/filter <— wrong-way
https://www.media-junkie.com/_functions/filter <— the right one!!!
But now the question is, why it got no data out of my DB ?
Connection to a similar post (post instead of get).
@shantanukumar847 Ok, i also got the last step.
export function get_filter(request) {
// First check if a query parameter is present in the request or not
//if(request.query) {console.log("x1")
return wixData.query("Team") //remember to put a return here
.find() //suppress authorization checks
.then((res) => {console.log(res)
// Now check the length of the items retrieved
if(res.items.length > 0) {
// Items found so return a 200 HTTP response
let options = {
status: 200,
body: res.items
};
return response(options); // similar to ok()
} else {
// No items found, return a 404 HTTP response
let options = {
status: 404,
body: 'No items found'
};
return response(options); // similar to notFound()
}
})
.catch( (error) => {
// This will catch any error with the wixdata query
let options = {
status: 500,
body: 'ERROR shit happens again XD.' //error
};
return response(options); // similar to serverError()
});
/*
} else {
// Send a 400 response if no query params are found
let options = {
status: 400,
body: 'No query parameters found XXXXXD'
};
return response(options); // similar to badRequest()
}
*/
}
I deactivated the…
First check if a query parameter is present in the request or not
…since i do not send any params in my query, but i understood what it is used for.
Now, i get my wished results out of DATABASE.
A new door is opened to a new world! 
