Centrar botones DataTables

buttons: [{
                //Botón para Excel
                extend: 'excelHtml5',
                footer: true,
                title: 'Archivo',
                filename: 'Export_File',

                //Aquí es donde generas el botón personalizado
                text: '<span class="badge badge-success"><i class="fas fa-file-excel"></i></span>'
            },
            //Botón para PDF
            {
                extend: 'pdfHtml5',
                download: 'open',
                footer: true,
                title: 'Reporte de usuarios',
                filename: 'Reporte de usuarios',
                text: '<span class="badge  badge-danger"><i class="fas fa-file-pdf"></i></span>',
                exportOptions: {
                    columns: [0, ':visible']
                }
            },
            //Botón para copiar
            {
                extend: 'copyHtml5',
                footer: true,
                title: 'Reporte de usuarios',
                filename: 'Reporte de usuarios',
                text: '<span class="badge  badge-primary"><i class="fas fa-copy"></i></span>',
                exportOptions: {
                    columns: [0, ':visible']
                }
            },
            //Botón para print
            {
                extend: 'print',
                footer: true,
                filename: 'Export_File_print',
                text: '<span class="badge badge-light"><i class="fas fa-print"></i></span>'
            },
            //Botón para cvs
            {
                extend: 'csvHtml5',
                footer: true,
                filename: 'Export_File_csv',
                text: '<span class="badge  badge-success"><i class="fas fa-file-csv"></i></span>'
            },
            {
                extend: 'colvis',
                text: '<span class="badge  badge-info"><i class="fas fa-columns"></i></span>',
                postfixButtons: ['colvisRestore']
            }
        ]