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The error is in this line of code.
var isCreated = data.length 0; // this expression will return true or false

Now in addition to the error above, I get this.

HI Ellen,

In this case - you have "data" variable with undefined value. Thus you have this problem.

Regards.

What is that? I just used the code you gave me.

Hello Ellen,

If where parameter in request hasn't valid value, response has in description "Incorrect query".

Code that support team provides, can be used as example and each case should be modified, there is no real use case, when you can copy code without changing/adding something.

This is what I have. Should something be changed?

Ellen,

1) Value from that javascript should be returned as a string, so the mapping could use it for you 'where' parameter
2) Instead of "hereisYourUserIdYouWantToTest", obviously ,you need to put id

So I simply changed "hereisYourUserIdYouWantToTest" to "id" and it didn't change anything.

Hello Ellen.
Id of each collection looks like "5489e282e4b05c4ac3be8869".
You are trying to search for users in your collection. Id(identifier) is a unique sequence of numbers and characters, that makes one item(entity) different to another within one collection or Database(depending on Database).
So you need somehow(local variable, mapping, component on the page) store it for users, and get one of them before sending request for searching user by it's id in this where parameter. Don't forget that you can't simply set where parameter value to user id, you need to point that it is column id and return it to the where parametr
IT IS JUST AN EXAMPLE, NOT YOUR USER'S ID
return '{"_id": "5489e282e4b05c4ac3be8869"}';

Ohh now I understand! I already have an _id mapped to a label so would I just put the name of the label there?