(Reuters) - Credit card issuer American Express Co reported an 8.5% rise in second-quarter profit on Friday, boosted by higher customer spending.Net income rose to $1.76 billion (£1.41 billion), or $2.07 per share, in the quarter ended June 30, from $1.62 billion, or $1.84 per share, a year earlier, the company said. (https://reut.rs/32ys3vT)Total revenue, excluding interest expense, rose 8.4% to $10.84 billion.