fix: prevent fetchUserContacts error when user has no contact

[PierreJeanjacquot]

issue:

when no granted access is found in market API, the subgraph was called with bad params resulting in an error

=> subgraph error when processing the query GetValidContacts with $id = []

query GetValidContacts(
    $requiredSchema: [String!]!
    $id: [String!]!
    $start: Int!
    $range: Int!
  ) {
    protectedDatas(
      where: {
        transactionHash_not: "0x"
        schema_contains: $requiredSchema
        id_in: $id
      }
      skip: $start
      first: $range
      orderBy: creationTimestamp
      orderDirection: desc
    ) {
      id
    }
}

error

{ message: "bad indexers: {0xbdfb5ee5a2abf4fc7bb1bd1221067aef7f9de491: BadResponse(unattestable response: panic processing query: index out of bounds: the len is 0 but the index is 0), 0xf92f430dd8567b0d466358c79594ab58d919a6d4: BadResponse(unattestable response: panic processing query: index out of bounds: the len is 0 but the index is 0)}" }

[abbesBenayache]

LGTM