AWS Amplify searchable field by geo distance (location) - amazon-web-services

Question

I'm developing an application that will allow users to search for other users by ordering them by geo location.
According to the information found on the internet, to do this on amplify I have to perform the following steps:
create an elastic search mapping, indicating the type 'geo_point' on the lastPosition attribute (I would like to define it once in the project file and not at each build in the elastic search console)
create a custom query and a custom vtl resolver and set the sort by lastPosition (of type '_geo_distance') in it.
But I don't understand how to do these 2 steps, so I need some suggestion :(.
// my schema.graphql
type User
#model
#auth(rules: [{allow: owner}, {allow: private, operations: [read]}])
#searchable {
// ...other fields
id: ID!
lastPosition: Position
positionUpdatedAt: AWSDateTime
}
type Position {
lat: Float!
lon: Float!
}
// my custom searchUsers query in graphql/custom_queries.ts
export const searchUsersNearby = /* GraphQL */ `
query SearchUsersNearby(
$filter: SearchableUserFilterInput
$sort: [SearchableUserSortInput]
$location: PositionInput // current user position that i need to use in vtl resolver to sort users by distance,
$limit: Int
$nextToken: String
$from: Int
$aggregates: [SearchableUserAggregationInput]
) {
searchUsersNearby(
filter: $filter
sort: $sort
limit: $limit
nextToken: $nextToken
from: $from
aggregates: $aggregates
) {
items {
id
// ...other fields
lastPosition
positionUpdatedAt
createdAt
updatedAt
owner
}
nextToken
total
aggregateItems {
name
result {
... on SearchableAggregateScalarResult {
value
}
... on SearchableAggregateBucketResult {
buckets {
key
doc_count
}
}
}
}
}
}
`;
I use amplify v8.1.0 with transformer v2.
Thank you guys