Checked that account exists

[RogerNoble]

Seems the account endpoint doesn't always return all the accounts. Added
a check to see it exists before attempting to get the displayName.

[RobertoGraham]

Often when there's no displayName it means that the Fortnite account is not backed by an Epic Games account but by a PSN/XBL account. If the externalAuths key is present in a the account object you can try to find externalDisplayName in the externalAuths object. Here is my Java implementation:

EnhancedLeaderBoardEntry enhancedLeaderBoardEntry = new EnhancedLeaderBoardEntry();

Account matchingAccount = accounts.stream()
        .filter(account -> account.getId().equals(entry.getAccountId().replace("-", "")))
        .findFirst()
        .orElse(null);

if (matchingAccount != null) {
    String displayName = matchingAccount.getDisplayName();

    if (displayName == null) {
        List<ExternalAuth> externalAuths = new ArrayList<>(matchingAccount.getExternalAuths().values());

        if (externalAuths.size() > 0)
            displayName = externalAuths.get(0).getExternalDisplayName();
    }

    enhancedLeaderBoardEntry.setDisplayName(displayName);
}

enhancedLeaderBoardEntry.setWins(entry.getValue());
enhancedLeaderBoardEntry.setRank(entry.getRank());
enhancedLeaderBoardEntry.setAccountId(entry.getAccountId());

return enhancedLeaderBoardEntry;

[RogerNoble]

@RobertoGraham I see. Do you happen to know the endpoint for getExternalAuths so I can add the implementation?

[RobertoGraham]

The external auth objects are included in accounts returned by Endpoint.displayNameFromIds

[ {
  "id" : "4035ca150e3a447a8f95680d19ce0f7c",
  "displayName" : "Morrissh24",
  "externalAuths" : {
    "psn" : {
      "type" : "psn",
      "externalAuthId" : "7225186713796739299",
      "accountId" : "4035ca150e3a447a8f95680d19ce0f7c",
      "externalDisplayName" : "Morrissh24"
    }
  }
} ]

[qlaffont]

@RogerNoble did you finish your pull request ? Can i merge ?

[RogerNoble]

@qlaffont Feel free if you are happy with the fix.

I have not had a chance to implement the suggestion from @RobertoGraham. However I usually prefer to keep PR's small so probably best addressed separately.