function Get-NewRelicAccountDetails {
<#
.SYNOPSIS
    Returns the appropriate New Relic account (not Admin) API key and license key based on environment string
#>

    [CmdletBinding()]
    Param(
        [Parameter(Mandatory = $true)]
        [Alias("Environment")]
        [string]$environmentKey
    )

    $logLead  = (Get-LogLeadName);

    $specificAccountDetails = @(
        # FI specific accounts.
        @{EnvironmentRegex = "(AWS Production( Entrust)? 5)|(AWS Staging Lane FT\w+)";     APIKey = "5362c58099d6a19871a07f66b1ec50e2c00f66b4b69260e"; LicenseKey = "4e8134a277da93644407dc53931f81d99b69260e"; },
        @{EnvironmentRegex = "AWS Production( Entrust)? 9";                                APIKey = "b84b09aabf2ebe0773009698205220e9d53063bf84d041f"; LicenseKey = "417a21abe2bd84ca46940efc9c93cf75584d041f"; },
        @{EnvironmentRegex = "(AWS Production( Entrust)? 10)|(AWS Staging Lane OTSStg)";   APIKey = "3d0346ec856cc9b02b3b0fcc481afc989a4f9941b28a80d"; LicenseKey = "d2eb268d151e57550de821438c3d99131b28a80d"; },
        @{EnvironmentRegex = "(AWS Production( Entrust)? 15)|(AWS Staging Lane MACUStg)";  APIKey = "fcb208ec98958282362c4e7879bfa38e4073c10c073cc2f"; LicenseKey = "77b3cae28080be6a5ebcb7d2f3efdde8d073cc2f"; },
        # Internal special-purpose accounts.
        @{EnvironmentRegex = "^AWS Production 0$";                                         APIKey = "d34b1647dee7875568ebc4b7c97c37216c4c342b37bcce1"; LicenseKey = "b17e86388ca5c4a2c4777cd1b0e1e12a837bcce1"; }
    )

    $defaultAccountDetails = @(
        # Legacy QA and Dev account.
        @{EnvironmentRegex = "((?<!AWS )\bQ(A|W)\d*\b)|^AWS (DEV|CICD)"; APIKey = "0cdfe5a47b10db89acf3560e47d4657fbfec081040e50b8"; LicenseKey = "f88cf2f1ed5fca2600f6a49e63778274c40e50b8"; },
        # AWS QA account.
        @{EnvironmentRegex = "^AWS QA";                           APIKey = "955b8bfccbdde190f855238dc55f17ba5d6382ee2492392"; LicenseKey = "e941422aebc76c48d195bcdcf86e4f7602492392"; },
        # Default Load Test account.
        @{EnvironmentRegex = "LT vPod";                           APIKey = "b9a9731deca97828205662ffc9a4cc400d74abc94685b0c"; LicenseKey = "4c5f1d447e2fab98cc9c30ff5dc864d614685b0c"; },
        # Default Sandbox environment account.
        @{EnvironmentRegex = "Sandbox";                           APIKey = "0cdfe5a47b10db89acf3560e47d4657fbfec081040e50b8"; LicenseKey = "f88cf2f1ed5fca2600f6a49e63778274c40e50b8"; },
        # Default DR account.
        @{EnvironmentRegex = "^AWS DR Production";                APIKey = "6a9e9820d3aaf12278c80d0bc1433b90aee1ea5769ac25f"; LicenseKey = "b55c8c163b1ede6fef75f6f586a1dbb6869ac25f"; },
        # Default production account.
        @{EnvironmentRegex = "^AWS Production";                   APIKey = "NRRA-8fbdf2188c09dd34aef478e13e31668e405324a304"; LicenseKey = "e0318c558f353e420720d4417ebe4cbd43b7d425"; },
        # Default staging account.
        @{EnvironmentRegex = "^AWS Staging";                      APIKey = "a156af42c6da91536e67f2414bc1c25f3742e41b0cb93ab"; LicenseKey = "3707290484dceca2dc2ecd71e40fb0ff40cb93ab"; }
    )

    [array]$accountInfo = $specificAccountDetails | Where-Object {$environmentKey -match $_.EnvironmentRegex}

    # If the unique lookup failed, attempt to use a default.
    if ( Test-IsCollectionNullOrEmpty $accountInfo ) {

        Write-Verbose ( "$logLead : No specific account found for '{0}'; looking for default." -f $environmentKey )

        [array]$accountInfo = $defaultAccountDetails | Where-Object {$environmentKey -match $_.EnvironmentRegex}
    }

    if (Test-IsCollectionNullOrEmpty $accountInfo) {

        throw ("$logLead : Unable to find New Relic account info which matches environment key '{0}'." -f $environmentKey)

    } elseif ($accountInfo.Count -gt 1) {

        throw ("$logLead : Found more than one New Relic account info which matches environment key '{0}'." -f $environmentKey)
    }

    Write-Verbose ("$logLead : Returning entry with EnvironmentRegex '{0}'." -f $accountInfo.EnvironmentRegex)
    return ($accountInfo | Select-Object -First 1)
}