read_excel(path, sheet = 1, col_names = TRUE, col_types = NULL, na = "", skip = 0)
TRUEto use the first row as column names,
FALSEto number columns sequentially from
Xn, or a character vector giving a name for each column.
NULLto guess from the spreadsheet or a character vector containing "blank", "numeric", "date" or "text".